Elastic Modulus of Concrete from Compression Tests

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Title: Elastic Modulus of Concrete from Compression Tests

Author(s): Baidar Bakht, Leslie G. Jaeger, and Aftab A. Mufti

Publication: Materials Journal

Volume: 86

Issue: 3

Appears on pages(s): 220-224

Keywords: compression tests; concretes; finite element method; strains; modulus of elasticity; Poisson ratio; stresses; tests; Materials Research

Date: 5/1/1989

Abstract:
In recent technical literature, it has been suggested that the values of the elastic modulus E and Poisson's ratio {nu} of concrete as measured by the usual kind of compression test on a cylindrical specimen are significantly low because axial strain is measured at the surface of the cylinder rather than along its central axis; the actual values of E and {nu} are suggested to be some 55 percent higher than the measured values. This paper examines that postulate in some detail and, supported by finite element analysis, reaches the conclusion that the values of E and {nu} as measured by the usual compression test are reliable and should continue to be used.